225004445 has 4 divisors (see below), whose sum is σ = 270005340. Its totient is φ = 180003552.

The previous prime is 225004411. The next prime is 225004459. The reversal of 225004445 is 544400522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544400522 = 2 ⋅272200261.

It can be written as a sum of positive squares in 2 ways, for example, as 170746489 + 54257956 = 13067^2 + 7366^2 .

It is a cyclic number.

It is not a de Polignac number, because 225004445 - 2¹⁰ = 225003421 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22500440 + ... + 22500449.

It is an arithmetic number, because the mean of its divisors is an integer number (67501335).

Almost surely, 2^225004445 is an apocalyptic number.

It is an amenable number.

225004445 is a deficient number, since it is larger than the sum of its proper divisors (45000895).

225004445 is an equidigital number, since it uses as much as digits as its factorization.

225004445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45000894.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 225004445 is about 15000.1481659349. The cubic root of 225004445 is about 608.2242047736.

Adding to 225004445 its reverse (544400522), we get a palindrome (769404967).

The spelling of 225004445 in words is "two hundred twenty-five million, four thousand, four hundred forty-five".